package tets;
import java.util.Scanner;
public class Test4 {
    public static  int fun(int x){
        if(x<0)
            x= Math.abs(x);
        int tmp=x;
        int sum=0;
        while(tmp>0){
            sum=sum*10+tmp%10;
            tmp=tmp/10;
        }
        if(sum==x){
            return 1;
        }
        else {
            return 0;
        }
    }
    public static void main(String[] args) {
        int x=0;
        Scanner sc = new Scanner(System.in);
        x=sc.nextInt();
       int ret=fun(x);
       if(ret==1){
           System.out.println("是");
       }
       else {
           System.out.println("不是");
       }
    }
}
